落叶松胴枯病Phomopsis cryptomeriae KITAJIMA et KAMEL.是我省林区新发生的一种真菌病害。该病50年代在日本有发生。我国过去未曾发现,国内文献也未见报道。 1979年秋季,在清原县大孤家子林场发现两株10年生日本落叶松树冠枝梢枯萎现象,经检验是由2—3个病斑绕树干一周所致。1980年丹东地区、东沟等林场大面积发生此病,据了解发病面积万亩左右,除华北落叶松12—13年生幼林有发病外,日本落叶松 Larch Phomopsis cryptomeriae KITAJIMA et KAMEL. Is a new fungal disease in the forest of our province. The disease occurred in Japan in the 1950s. In the past, our country did not find any reports on the domestic literature. In the fall of 1979, two 10-year-old Larix kaempferi twigs were withered in the Daguanjiazi Forest Farm in Qingyuan County. The test was caused by 2-3 weeks of diseased tree trunks. In 1980, Dandong, Donggou and other forest farms occurred in a large area, it is understood that the disease area of ​​about mu, except for Larix principis-rupprechtiii 12-13-year-old young forest disease, the Japanese larch